CN110670753B - One-way idle-stroke-free friction damper - Google Patents
One-way idle-stroke-free friction damper Download PDFInfo
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- CN110670753B CN110670753B CN201910924210.2A CN201910924210A CN110670753B CN 110670753 B CN110670753 B CN 110670753B CN 201910924210 A CN201910924210 A CN 201910924210A CN 110670753 B CN110670753 B CN 110670753B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
Abstract
The invention relates to a one-way idle-stroke-free friction damper, which comprises: an outer housing; the brake component is arranged inside the outer shell and comprises an optical axis, a rack, a driving gear, an engaging part and a one-way driving part, wherein the engaging part and the one-way driving part are coaxially connected in a stepped manner; the upper connecting plate is arranged on the upper side of the outer shell and is connected with the upper end of the optical axis; the lower connecting plate is arranged at the lower side of the outer shell. Compared with the prior art, the invention has the advantages of no idle stroke and high efficiency, and avoids the compression of components.
Description
Technical Field
The invention relates to the technical field of energy dissipation and shock absorption of civil engineering structures, in particular to a one-way idle-stroke-free friction damper.
Background
There are many tension members in building structures, but there is currently no energy-dissipating shock absorbing device specifically adapted for use in a tie rod system. Conventional dampers are used in tension members, and members normally subjected to only tensile force may be subjected to compressive force under the action of an earthquake, so that the members are likely to be broken by compression buckling. When the unidirectional friction type damper is used in the tension member, although the member may be deformed under the action of earthquake, once the unidirectional damper is compressed, the unidirectional damper works to release the pressure in the member, so that the buckling damage of the member is not caused, and the member can be completely designed according to the tension member. In the aspect of application, at present, high-rise buildings and super high-rise buildings are more and more, the envelope structure of the buildings mostly adopts a curtain wall system, energy dissipation and shock absorption of the curtain wall system are still lack of special measures, and the curtain wall suspender is used as a tension member and can be matched with a one-way friction damper to improve the shock absorption performance of the curtain wall under the action of an earthquake. In addition, the suspension structure is a novel structure form, the earthquake damping performance of the suspension structure is very important, and the tension member of the suspension structure is provided with the one-way friction type damper, so that the suspension structure has good energy dissipation and shock absorption effects.
One problem in the prior art is that the current one-way friction damper has a lost motion phenomenon, that is, when the damper displacement reaches a negative peak value and moves to a zero position, the damping force is not increased immediately and is kept at a certain value close to zero, which reduces the working efficiency of the damper.
CN108360701A discloses a novel one-way friction type damper, which comprises an outer cylinder, a transmission rod with gears, a ratchet wheel, an inner wheel, a transmission shaft, a main plate, an auxiliary plate, a friction plate and a high-strength bolt for providing the pre-tightening force required by the friction between the main plate and the auxiliary plate. When the transmission rod moves upwards, the ratchet wheel rotates clockwise, the inner teeth of the ratchet wheel cannot clamp the pawl, the ratchet wheel cannot drive the inner wheel to rotate, the inner wheel cannot drive the transmission shaft to rotate, the transmission shaft cannot drive the main plate to rotate, the main plate cannot rub the friction plate, no damping force is generated at the moment, and the component can be prevented from being pressed and bent or damaged; when the transmission rod moves downwards, the ratchet wheel rotates anticlockwise, the pawl is clamped by the inner teeth of the ratchet wheel to drive the inner wheel to rotate, the inner wheel drives the transmission shaft to rotate, and therefore the main plate fixed on the transmission shaft rotates to rub with the friction plate under certain pretightening force.
Disclosure of Invention
The invention aims to solve the problems and provide a one-way friction damper without idle stroke, which has no idle stroke phenomenon and improves the working efficiency of the damper.
The purpose of the invention is realized by the following technical scheme:
a one-way lost motion-free friction damper, the damper comprising:
the upper side of the shell is provided with a hole;
a brake assembly disposed within the outer housing, the brake assembly comprising:
an optical axis passing through the hole of the outer shell,
a rack arranged at the lower end of the optical axis,
a driving gear which comprises a meshing part and a one-way driving part which are coaxially connected in a stepped manner, wherein the side surface of the meshing part is provided with teeth which are in meshing transmission connection with a rack, a stepped coaxial hollow section is arranged inside the driving gear,
an overrunning clutch, which is sleeved in the hollow section of the one-way driving part and is in one-way transmission connection with the one-way driving part,
a main shaft which is vertical to the optical axis, is sleeved in the hollow section of the engaging part and the overrunning clutch, is connected with the engaging part in a sliding way and is connected with the overrunning clutch in a transmission way, and two ends of the main shaft are connected with the inner wall of the outer shell,
the friction assembly parts are sleeved on the two end parts of the main shaft and clamp the driving gear in the middle;
the upper connecting plate is arranged on the upper side of the outer shell and is connected with the upper end of the optical axis;
the lower connecting plate is arranged on the lower side of the outer shell;
when the upper connecting plate moves upwards, the driving gear rotates, so that the overrunning clutch is driven to rotate, the main shaft is driven to rotate, and the friction assembly acts to generate damping force; when the rack moves downwards, the driving gear rotates, but the overrunning clutch cannot be driven to rotate, the shaft cannot be driven to rotate, and damping force is not generated.
Furthermore, the friction assembly comprises a secondary plate, a first friction plate, a main plate and a second friction plate which are sequentially connected, the second friction plate is adjacent to the inner wall of the outer shell, and the main plate is respectively rubbed with the first friction plate and the second friction plate to increase the friction area.
Furthermore, along the length direction of the main shaft, two side faces of the outer shell are provided with spring pressing sheets, the spring pressing sheets are connected with the friction assembly through the extremely-heavy load spring, the extremely-heavy load spring can compress the friction assembly and the spring pressing sheets, and meanwhile the size of the damping force can be adjusted by adjusting the pre-tightening force of the extremely-heavy load spring.
Furthermore, the main shaft is sleeved with a sliding bearing and is installed in the meshing part of the driving gear through the sliding bearing. The main shaft is prevented from being abraded with the inside of the meshing part of the driving gear, the service life is prolonged, and the balance of the whole damper is guaranteed.
Furthermore, the lateral wall of the shell is provided with symmetrical holes, the end part of the main shaft is erected on the holes and connected with the shell through a rolling bearing, and a bearing end cover is arranged on the rolling bearing to ensure the sealing and limiting of the rolling bearing.
Furthermore, the rack is connected with the optical axis through a connecting strip, the optical axis and the rack are both arranged at the end part of the connecting strip, and the rack and the connecting strip form a shape like a Chinese character 'factory'. Therefore, the driving gear and the main shaft can be positioned in the middle of the whole damper as much as possible, and the stability is good.
Further, be equipped with spacing piece and lower spacing piece on the optical axis, go up the spacing piece and be located the shell body upside, lower spacing piece is located the shell body inside, and the spacing slide bearing of a plurality of between two spacing pieces is with optical axis and shell body sliding connection. The upper and lower limiting blocks are used for limiting the position of the upper connecting body, and the limiting sliding bearing ensures that the rack moves along the linear direction
Further, the shell body is a split type shell body and comprises an upper shell and a lower shell, a split type boss is arranged at the joint of the upper shell and the lower shell, bolts are adopted between the split type bosses to fix the split type bosses, a connecting plate is arranged on the inner wall of the upper shell and the inner wall of the lower shell, the upper end of the connecting plate is fixedly connected with the upper shell, the lower end of the connecting plate is fixedly connected with the lower shell, and a round hole is formed in the side face of the upper shell and is opposite to the driving gear.
Furthermore, the upper connecting plate is provided with a connecting column, and the connecting column is connected with the upper end of the optical axis; the lower connector is provided with a support column, the support column is provided with a bearing plate, two ends of the bearing plate are provided with two lugs, the lower shell is arranged on the bearing plate, and the side face of the lower shell is fixedly connected with the two lugs.
The overrunning clutch is a clutch which can be automatically engaged or disengaged by utilizing the change of the relative movement speed of a driving part and a driven part or the change of the rotation direction, has the main functions of preventing reversion, accurately positioning, transmitting torque and cutting off the torque, and is also called a backstop or a one-way bearing.
In order to realize transmitting the energy to the main shaft through the overrunning clutch, rather than directly transmitting the energy from the gear, a novel gear is adopted, the novel gear comprises a meshing part which can be meshed with the rack and a one-way driving part which is connected with the overrunning clutch in a one-way transmission manner, a sliding bearing is arranged in the meshing part, the gear is ensured not to directly drive the main shaft, a hollow section is arranged in the driving gear, the hollow section is used for accommodating the main shaft and the overrunning clutch, the space is saved, and the center of gravity is low and concentrated on the middle lower part of the outer shell. The friction assembly comprises the auxiliary plate, the first friction plate, the main plate and the second friction plate, the friction area is increased, and more damping force can be generated under the same pulling force.
The invention provides a one-way no-idle-stroke friction damper, which dissipates seismic energy and protects a structural member when the structural member deforms under the action of an earthquake. When the rack moves upwards, the driving gear rotates, so that the overrunning clutch is driven to rotate, the main shaft is driven to rotate, the main plate is driven to rotate, friction is generated between the main plate and the first friction plate and between the main plate and the second friction plate respectively, and damping force is generated; when the rack moves downwards, the driving gear rotates, but the overrunning clutch cannot be driven to rotate, the shaft cannot be driven to rotate, and damping force is not generated. The invention realizes that the structural member is only in a tension state, can avoid the member from being pressed and buckled or damaged, and has no idle stroke.
Compared with the prior art, the invention has the following advantages:
1. the idle stroke phenomenon is avoided, and the working efficiency of the damper is improved.
2. The structural member is only in tension, and the member can be prevented from buckling or breaking under compression.
3. The damping force can be adjusted, the magnitude of the damping force is adjusted by adjusting the pretightening force of the extremely heavy load spring, and the damper is convenient to apply.
4. The stroke of the damper can be changed by changing the number and the size of the teeth on the rack and the driving gear and the distance between the upper limiting block and the lower limiting block.
5. The extremely heavy load spring is arranged outside the outer shell, the working performance of the friction assembly can be conveniently detected, if the pre-tightening force is insufficient, the extremely heavy load spring can be directly adjusted to adjust the pre-tightening force, and the whole damper does not need to be disassembled.
Drawings
FIG. 1 is a perspective view of a one-way lost motion friction damper;
FIGS. 2-3 are front views of a one-way lost motion friction damper;
FIG. 4 is a side view of a one-way lost motion friction damper;
FIG. 5 is a perspective view of the drive gear;
FIG. 6 is a cross-sectional view of the drive gear;
FIG. 7 is a perspective view of the optical axis, connecting strip and rack;
fig. 8 is a left side view of the optical axis, connecting strip and rack.
In the figure: 1-an upper connecting plate; 101-connecting column; 2-upper housing; 201-a separate boss; 202-connecting plate; 203-round hole; 3-a lower housing; 4-a brake assembly; 401 — an upper limit block; 402-limit plain bearings; 403-a drive gear; 404-a plain bearing; 405-a secondary plate; 406 — a first friction plate; 407-main board; 408-a second friction plate; 409-rolling bearing; 410-a bearing end cap; 411-spring tablet press; 412-extremely heavy load spring; 413-a main shaft; 414-overrunning clutch; 415-a lower limit block; 416-optical axis; 417-rack; 418-shaft sleeve; 419-connecting strips; 420-an engagement portion; 421-one-way driving part; 422-teeth; 423-hollow section; 5-a lower connecting plate; 501-supporting columns; 502-a bearing plate; 503-ear.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
1-4, a one-way, non-lost motion friction damper, comprising:
the upper side of the outer shell is provided with a hole, the outer shell is a split type shell and comprises an upper shell 2 and a lower shell, a separated boss 201 is arranged at the joint of the upper shell 2 and the lower shell 3, the separated bosses 201 are fixed by bolts, the inner walls of the upper shell 2 and the lower shell 3 are provided with a connecting plate 202, the upper end of the connecting plate 202 is fixedly connected with the upper shell 2, the lower end of the connecting plate is fixedly connected with the lower shell 3, and the side surface of the upper shell 2 is provided with a round hole 203 which is opposite to a driving gear 403;
a brake assembly 4, locate inside the shell body, brake assembly 4 includes:
an optical axis 416 penetrates through a hole of the outer shell, an upper limiting block 401 and a lower limiting block 415 are arranged on the optical axis 416, the upper limiting block 401 is positioned at the upper side of the outer shell, the lower limiting block 415 is positioned in the outer shell, two limiting sliding bearings 402 are arranged between the two limiting blocks, and the optical axis 416 is connected with the outer shell in a sliding manner;
a rack 417 disposed at the lower end of the optical axis 416, the rack 417 being connected to the optical axis 416 through a connecting strip 419, the optical axis 416 and the rack 417 being disposed at the end of the connecting strip 419, the rack 417 and the connecting strip 419 forming a "factory" shape, as shown in fig. 7 and 8;
a driving gear 403, including a meshing part 420 and a one-way driving part 421 which are coaxially connected in a stepped manner, wherein the side surface of the meshing part 420 is provided with teeth 422, and is in meshing transmission connection with the rack 417, and a stepped coaxial hollow section 423 is arranged inside the driving gear 403, as shown in fig. 5 and 6 in particular, wherein the one-way driving part 421 is in a disc shape and has a smooth surface;
an overrunning clutch 414 sleeved in the hollow section of the one-way driving portion 421 and connected to the one-way driving portion 421 in a one-way transmission manner;
a main shaft 413 which is perpendicular to the optical axis 416 and is sleeved in the hollow section 423 of the meshing part 420 and the overrunning clutch 414, wherein the main shaft 413 is sleeved with a sliding bearing 404, is installed in the meshing part 420 of the driving gear 403 through the sliding bearing 404, is connected with the meshing part 420 in a sliding manner and is connected with the overrunning clutch 414 in a transmission manner, two ends of the main shaft 413 are connected with the inner wall of the outer shell, symmetrical holes are formed in the side wall of the outer shell, the end part of the main shaft 413 is erected on the holes and is connected with the outer shell through a rolling bearing 409, and the rolling bearing 409 is provided with a bearing end cover 410;
the friction assemblies are sleeved on two end portions of the main shaft 413, the driving gear 403 is clamped in the middle, the friction assemblies are two and comprise an auxiliary plate 405, a first friction plate 406, a main plate 407 and a second friction plate 408 which are sequentially and tightly connected, the second friction plate 408 is adjacent to the inner wall of the outer shell, four bolts sequentially pass through a spring pressing sheet, a heavy load spring, the outer shell, the second friction plate, the first friction plate and the auxiliary plate, the compression amount of the heavy load spring is adjusted through the left bolt and the right bolt, the positive pressure of the main plate is adjusted, and the braking force of the adjusting device is adjusted.
A meshing part 420 close to the driving gear 403, a close overrunning clutch 414, a shaft sleeve 418 is arranged between the auxiliary plate 405 close to the meshing part 420 and the driving gear 403, two side surfaces of the outer shell are provided with spring pressing sheets 411 along the length direction of a main shaft 413, and the spring pressing sheets 411 are connected with the outer wall surface of the outer shell through a heavy load spring 412;
the upper connecting plate 1 is arranged on the upper side of the outer shell and is provided with two connecting columns 101, the upper end of the optical axis 416 is a cuboid, the lower end of the optical axis 416 is a cylinder, the cuboid is provided with a hole, and the connecting columns 101 clamp the cuboid in the middle and are connected with the optical axis 416 through bolts;
the lower connecting plate 5 is arranged on the lower side of the outer shell, two support columns 501 are arranged on the lower connecting plate 5, a bearing plate 502 is arranged on each support column 501, two lugs 503 are arranged at two ends of each bearing plate 502, the lower outer shell 3 is arranged on each bearing plate 502, and the side faces of the lower outer shell are fixedly connected with the two lugs 503;
when the upper connecting plate 1 moves upwards, the damper moves in the energy transfer sequence of the upper connecting plate, the optical axis, the rack, the meshing part, the one-way driving part, the overrunning clutch, the main shaft and the friction assembly, and the gear is driven to rotate, so that the overrunning clutch is driven to rotate to drive the main shaft to rotate, and the friction assembly acts to generate damping force;
when the upper connecting plate 1 moves downwards, the damper moves in the energy transmission sequence of the upper connecting plate, the optical axis, the rack, the meshing part and the one-way driving part, but cannot drive the overrunning clutch to rotate, cannot drive the shaft to rotate, and cannot generate damping force.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (5)
1. A one-way lost motion-free friction damper, comprising:
the upper side of the shell is provided with a hole;
a brake assembly (4) disposed within the outer housing, the brake assembly (4) comprising:
an optical axis (416) passing through the aperture of the outer housing,
a rack (417) arranged at the lower end of the optical axis (416),
a driving gear (403) which comprises a meshing part (420) and a one-way driving part (421) which are coaxially connected in a stepped manner, wherein the side surface of the meshing part (420) is provided with teeth (422) which are in meshing transmission connection with a rack (417), a stepped coaxial hollow section (423) is arranged inside the driving gear (403),
an overrunning clutch (414) sleeved in the hollow section of the one-way driving part (421) and connected with the one-way driving part (421) in a one-way transmission way,
a main shaft (413) which is vertical to the optical axis (416), horizontally passes through the driving gear (403), is connected with the meshing part (420) in a sliding way and is connected with the overrunning clutch (414) in a transmission way,
a plurality of friction assemblies which are sleeved on two end parts of the main shaft (413) and clamp the driving gear (403) in the middle;
the upper connecting plate (1) is arranged on the upper side of the outer shell and is connected with the upper end of the optical axis (416);
a lower connecting plate (5) arranged at the lower side of the outer shell;
the main shaft (413) is sleeved with a sliding bearing (404) and is installed in a meshing part (420) of the driving gear (403) through the sliding bearing (404);
when the upper connecting plate moves upwards, the driving gear rotates, so that the overrunning clutch is driven to rotate, the main shaft is driven to rotate, and the friction assembly acts to generate damping force; when the rack moves downwards, the driving gear rotates, but the overrunning clutch cannot be driven to rotate, the shaft cannot be driven to rotate, and damping force is not generated;
the friction assembly comprises a secondary plate (405), a first friction plate (406), a main plate (407) and a second friction plate (408) which are sequentially and tightly connected, the second friction plate (408) is adjacent to the inner wall of the outer shell, two side faces of the outer shell are provided with spring pressing sheets (411) along the length direction of the main shaft (413), and the spring pressing sheets (411) are connected with the extremely-heavy load spring (412) and the friction assembly through bolts;
be equipped with spacing piece (401) and spacing piece (415) down on optical axis (416), go up spacing piece (401) and be located the shell body upside, spacing piece (415) are located the shell body down inside, are equipped with spacing slide bearing (402) of a plurality of between two spacing, with optical axis (416) and shell body sliding connection.
2. A one-way friction damper without idle stroke according to claim 1, characterized in that the side wall of the outer shell is provided with symmetrical holes, the end of the main shaft (413) is erected on the holes and connected with the outer shell through a rolling bearing (409), and the rolling bearing (409) is provided with a bearing end cover (410).
3. A one-way friction damper without idle stroke according to claim 1, characterized in that the rack (417) is connected with the optical axis (416) through a connecting strip (419), the optical axis (416) and the rack (417) are both arranged at the end of the connecting strip (419), and the rack (417) and the connecting strip (419) form a zigzag shape.
4. The friction damper without the idle stroke in one direction as claimed in claim 1, wherein the outer shell is a split type shell, and comprises an upper shell (2) and a lower shell, a separate boss (201) is arranged along the joint of the upper shell (2) and the lower shell (3), the separate bosses (201) are fixed by bolts, a connecting plate (202) is arranged on the inner walls of the upper shell (2) and the lower shell (3), the upper end of the connecting plate (202) is fixedly connected with the upper shell (2), the lower end of the connecting plate is fixedly connected with the lower shell (3), a round hole (203) is arranged on the side surface of the upper shell (2), and the round hole is opposite to the driving gear (403).
5. A one-way no-idle-stroke friction damper according to claim 1, characterized in that the upper connecting plate (1) is provided with a connecting column (101), the connecting column (101) is connected with the upper end of the optical axis (416);
the lower connecting plate (5) is provided with a supporting column (501), the supporting column (501) is provided with a bearing plate (502), two ends of the bearing plate (502) are provided with two lugs (503), the lower shell (3) is arranged on the bearing plate (502), and the side surface of the lower shell is fixedly connected with the two lugs (503).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910924210.2A CN110670753B (en) | 2019-09-27 | 2019-09-27 | One-way idle-stroke-free friction damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910924210.2A CN110670753B (en) | 2019-09-27 | 2019-09-27 | One-way idle-stroke-free friction damper |
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| CN110670753A CN110670753A (en) | 2020-01-10 |
| CN110670753B true CN110670753B (en) | 2022-03-18 |
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| CN201910924210.2A Active CN110670753B (en) | 2019-09-27 | 2019-09-27 | One-way idle-stroke-free friction damper |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111945877B (en) * | 2020-09-16 | 2022-02-01 | 福建创润建设有限公司 | Friction damper with damping function for fabricated building structure and 1/4 process |
| CN111997203B (en) * | 2020-09-16 | 2021-11-12 | 杭州萨麒装饰工程管理有限公司 | Installation method, structure and working method of assembly type building structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5759207B2 (en) * | 2011-03-02 | 2015-08-05 | 株式会社ニフコ | Rotating damper device and manufacturing method thereof |
| CN206571851U (en) * | 2017-03-12 | 2017-10-20 | 周承岗 | Contrate gear freewheel clutch |
| CN207111760U (en) * | 2017-08-24 | 2018-03-16 | 轻工业钟表研究所 | Freewheeling clutch |
| CN107830097A (en) * | 2017-10-09 | 2018-03-23 | 同济大学 | A kind of one-way damper |
| CN108360701B (en) * | 2018-01-17 | 2019-10-01 | 同济大学 | A kind of novel unidirectional friction damper |
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